Irish scored 10 tries at Brentford Community Stadium to set up a quarter-final away at three-time European champions RC Toulon.

“You’ve got to enjoy your wins, particularly in Europe and particularly at home,” Kiss told the club’s website.

“In the first-half we were really clinical, we put the things into play that we had planned for and they came off and we just didn’t take our foot off the throat.

“I thought the second-half, we had some simple errors and a bit of focus went out the window.

“We gave them what they wanted, they wanted a slow game to apply their set-piece pressure on us and we let them do it, which is the disappointing part about it.

“However, I love the courage we showed at the end of the game, we just thought, ‘let’s back ourselves’ and we put some points on the board.”

Castres threatened to pull off a remarkable comeback in the second half, scoring three tries in 20 minutes, but Irish ultimately cruised to victory after crossing four times late on.

Kiss warned his team that they must maintain their concentration for the full 80 minutes and avoid the errors which contributed to their opponents’ prosperous period at the start of the half.

“We won the first-half well, and the second-half was 24-all so we still have a little bit to work on.”

“At half-time, we talked about keeping the pressure on them by possession football but we just didn’t do that.

“They had all the time in the world to play how they wanted to play, and it wasn’t just about possession, it was how they slowed the game up.

“They walked to things, they kept the tempo in the way they like to play whereas we like to play quick and up-tempo and we didn’t get to that.

“We either dropped the ball or made a silly penalty error, which gave them exactly what they wanted, but I am disappointed about that 20-25 minutes, it’s a really tough feeling to have.

“Without a doubt, we have to take some learnings away from that but we have to understand that in Europe, 64 points is not too bad.”

London Irish head coach Les Kiss has praised his side for their free-scoring EPCR Challenge Cup Round of 16 performance on Friday which saw them beat Castres Olympique 64-27.